Improvement in blind-stile boring-machines



EDWARD H. SMITH."

Improvement in Blind Stile Boring Machines.

Patented Oct. 3i, 187i.

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EDWARD H. SMITH.

Improvement in Blind Stile BoringMachines.

No. 120,465. Patentedoci. 3|, 1871.

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4.1L PHaro-L/mnamm/c ca. /l x lossen/vri flemme] UNITED STATES PATENTOFFICE.

EDWARD H. SMITH, OF WHITESTOWN, NEW YORK, ASSIGNOR OF ONE-HALF HIS RIGHTTO ROBERT GIBSON, OF SAME PLACE.

IMPROVEMENT IN BLIND-STILE BORING-MACHINES.

Specification forming part of Letters Patent No. 120,465, dated October31, 1871.

To all whom it may concern:

Be it known that I, EDWARD H. SMITH, of Whitestown, Oneida county, Stateof New York, have invented certain Improvements in Blind- StileBoring-Machines, of which the following is a specification:

My invention relates to a combination which will securely hold theblind-stile in a certain position, so that as many holes as may bedesired and found convenient can be bored therein at the same time byaid of a number of bits adjusted in rotating spindles, which obtain thedesired motion by aid of an endless screw, the spindles and bits to beplaced at any desired distance apart by aid of two levers, to which asmany rods are connected as spindles are employed.

Sheet 1, Figure 1, is a front elevation of a machine embodying myinvention. Fig. 2 is a side elevation of the same. Sheet 2, Fig. 3, is atop view of the same.

A is the frame of the machine, which frame should be substantiallyconstructed so as to resist the vibration ofthe operatingparts. Ablindstile is laid on the table B between two lines of markers, a c, themarkers for the one side being in the groove in the inner edge of thetable, rising high enough to strike the stile, and held in position byset-screws or bolts, the markers on the opposite side being on a movablebar, c, and held in position by set-screws, said bar being moved up andback by means of two or more cams or levers, d cl. The stems of saidcams or levers are attached to a rod, e, parallel with the bar c. Bythis movement of the rod the bar, on which are the markers, is thrown upto the blindstile, and pressing it against the first line of markers,thus marking out the mortise and both sides at the same time, holdingthe blind-stile in position for boring. For the purpose of holding thebits in line and position the shanks of the bits are screwed into theend of the spindles, where they are adjusted by means of check-mits. Thetable bearing the blind-stile is moved by means of a lever, j", on theunder side, attached to both ends of the table, and worked by the handleg. In order to place the spindles C in proper position boxes D areemployed with proper bearings, in which the spindles revolve, said boxessliding` in a groove., 11 and held in position by gib and set-screws.The distances between the spindles and bits are increased or reduced bymeans of rods E E, attached to the boxes ofthe spindles and to the twolevers F F. y the movement of the said levers all the bits are placed atcertain equal distances apart, as desired. The two center boxes arestationary and the others movable, so as to adjust the distance betweenthe center bits, by aid of bolts and set-screws, through a slot in thebed of the machine. For the purpose of obtaining a rotary motion to thespindles and bits a screw-andworm gear, G, is employed, which againderives its motion from any desired power.

Having thus fully described my invention, I desire to claim- The frameA, in combination with the table B, the markers a a., the movable bar c,the levers d d, the rod e, the lever j', the spindles C, and boxes D,the rods E E, and leversF F, and Workinggear G, substantially as and forthe purpose hereinbefore set forth.

EDWARD H. SMITH.

W'itnesses:

